LPC 1788 Uart recieves no data

Hello I´m currently trying to set up the UART3 of my LPC 1788. The transmission of any messages works perfectly but I can´t recieve any messages.
The input-signal is on the pin which means I wouldn´t consider the hardware to cause troubles.

The config looks as follows:

        LPC_SC->PCONP |= (0x01 << 25); //Power UART3
        LPC_IOCON->P0_25 = 0x03;             //U3_TxD
        LPC_IOCON->P0_26 = 0x03;             //U3_RxD

        LPC_UART3->LCR = (0x01 << 7);  //Enable Baud-Rate config
        LPC_UART3->DLM = 0x00;
        LPC_UART3->DLL = 0x57;
        LPC_UART3->FDR = 0x21;                       //MulVal = 2, DivVal = 1

        LPC_UART3->FCR = 0x07;                       //Enable FIFO & Reset RX/TX Fifo

        LPC_UART3->LCR = 0x03;                       //8 Data-Bit, 1 Stop-Bit, NO-Parity, DLAB = 0 --> IR-Enable

        /* Enable Interrupt for UART3 channel */
    NVIC_EnableIRQ(UART3_IRQn);

        LPC_UART3->TER = 0x80;                       //Enable UART3 Transmit
        LPC_UART3->IER = 0x05;                       //Enable receive Data available Interrupt & Line Status IR

        /* preemption = 1, sub-priority = 1 */
        NVIC_SetPriority(UART3_IRQn, ((0x01<<3)|0x01));

The value of the line-staus registe is 0x98 which means:
Framing error status is active.
Break interrupt status is active.
UARTn RBR contains at least one UARTn RX error.

I´m thankful for any help I can get!